Sales (2)
| Title | Date Posted | Size | ||
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| Heating and Cooling Components Application Selection and Cross Reference Guide (English) | 07/2024 | 2001713 kb |
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| Residential Combustion Application Selection and Cross-Reference Guide (English) | 11/2023 | 9194921 kb |
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Install (3)
| Title | Date Posted | Size | ||
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| Installation Instructions for AT20, AT40, AT72D, AT87, AT88 Transformers (English, French) | 08/2020 | 822594 kb |
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| Installation Instructions for AT87A1205 Transformer (English) | 09/1986 | 90290 kb |
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| Transformers -Legacy Product Document | 10/1993 | 362577 kb |
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| Application | 48 VA powers 24V air conditioning circuits and other applications that do not exceed the listed ratings. |
|---|---|
| NEMA Rating | Yes |
| Primary Connection Size | 12 in, 305 mm |
| Primary Connection Type | Leadwires: Black and Black/Red |
| Primary Input Voltage | 480 V ac |
| Secondary Connection Size | 12 in, 305 mm |
| Secondary Connection Type | Leadwires |
| Secondary Open Circuit Voltage | 26.5 V.O.C. |
| VA Rating | 50 VA |
| Frequency | 50 Hz; 60 Hz |
| Approvals and Standards | UL Component Recognized, CSA Certified, NEC Class 2 |
| Includes | Energy limiting overload protection |
| Ambient Operating Temperature (Max) | 105 °F, 41 °C |
| Ambient Operating Temperature (Min) | -20 °F, -29 °C |
| Product Width | 2.22 in; 56.4 mm |
Resideo's 48 VA transformers power 24V air conditioning circuits and other applications that do not exceed the listed ratings.
- Meets NEC Class 2 not wet, Class 3 wet and UL 1585 requirements.
- Transformer marked NEMA Type E.
- Overload protection provided.
- Color-coded leadwires for primary connections.